SilverStone ST40NF Manual - Manual (Page 5)

SST-ST40NF
4.2.5 OVERLOAD PROTECTION
4.2.6 POWER GOOD SIGNAL
The power good signal is a TTL compatible signal for the purpose of initiating an orderly
star-up procedure under normal input operating conditions. This signal is asserted (low)
until +5Vdc has reached 4.75 volts during power up. Characteristics:
TTTL signal asserted (low state) : less than 0.4V while sinking 4mA.
TTL signal asserted (high state): Between 2.4 V and 5 V output while sourcing 200 µA
High state output impedance: less or equal to 1Kohm from output to common.
OUTPUT VOLTAGE
+3.3V
+5V
+12V
50A
48A
40A
Max. overcurrent limit
POWER GOOD @ 99Vac~264Vac,FULL LOAD
POWER FAIL @99Vac~264Vac, FULL LOAD
100 –500mSec.
1 mSec. minimum
PS_ON ON OFF
T1 20mS
T2 100~500mS
T3 1mS
+3.3VO/P
+5V O/P
+12VO/P
P.G.
P.G. SENSE
LEVEL 95%
T1 T2 T3
=
=
<
=
<
04